Sorry if this will turn out to be a duplicate question. I vaguely remember something similar on Meta, but I cannot seem to find it (and the explanation I'm looking for) anymore.
Today I came across ...

I am looking at my rank this week for gained reputation and I found something weird. It said that my reputation was 399, even though right now its is 433 (I have no idea why it is 418 here). I thought ...

When I view any profile I see that the user is top 5% this quarter or top 0.3% this year. Clicking on that link takes me to the page where I can see the week / month / quarter / year / overall rank.
...

I'm new to community as a contributor. Right now I'm answering questions for almost 5 days and getting a general feel that I am pretty useful.
When I'm watching my user page, I can see lot of numbers ...